“She was contriving a trick as she carred water in one hand and fire in the other.”
τῆι μὲν ὕδωρ ἐφόρει
δολοφρονέουσα χειρί, θἠτέρηι δὲ πῦρ.
Plutarch (in The Principle of Cold) says that this is about a woman who has contrary thoughts.
Archilochus, fr. 184